May 31, 2000 Essays - Irregular Bones, Skeletal System,

May 31, 2000 Comm 101 Topic: New ways to aid in nerve regeneration. General Purpose: To inform Specific Purpose: To inform the audience about news techniques and mechanisms that aid in nerve regeneration. Central Idea Statement: The new techniques for nerve regeneration involving magnetic, electrical, and chemical mechanisms look very promising. INTRODUCTION I. The site is rather common: someone in a wheel chair unable to use their lower body, or worse, unable to function from their neck down because of an accident. You may even know one of these people. They all have one thing in common: spinal nerve injury. To the majority of us, one of the more famous and recent cases involving spinal trauma is that of Christopher Reeve, known to most of us as Superman. Reeve was riding his horse when he fell off, landed on the back of his head and twisted his neck. His spine was damaged near the second cervical vertebrae; that being two vertebrae away from the base of the skull. He states that after his accident he saw a handbook written in 1990 that didn't even mention anyone higher than [the fourth cervical vertebrae] because 70 percent of them didn't live longer than five days. I am very lucky my injury happened at a time when treatment and surgery had improved. Dr. Cotman from UCI, who worked with Reeve says that Reeve remains optimistic that a c ure is only a few million dollars away. II. Prior to the end of the Second World War, if a person survived a severe spinal cord injury, the injury still usually resulted in their early death. This was because of complications that accompanied the injury, such as infections to the kidneys and lungs. Though the development of new antibiotics has greatly improved life expectancy, until recently medical science had not been able to restore nerve function. III. According to researchers at the University of Alabama using data from the regional SCI Centers, there are 7,800 traumatic spinal cord injuries each year in the US. Yet these numbers do not represent accurate figures since 4,860 per year, die before reaching the hospital. Current estimates are that 250,000-400,000 individuals live with spinal cord injury or dysfunction; forty-four percent of these occur in motor vehicle accidents. More than half of these injuries occur to individuals who are single, and more than 80% of these individuals are male. IV. Within the last five years, a great many things have been happening in the area of neurological research. Research and treatment involving spinal and nerve injury has progressed considerably. In this speech I will inform you on the new and promising techniques that are currently undergoing testing for human treatment, in terminology that we will be able to understand. BODY I. The nervous system consists of the brain, spinal cord, and all branching nerves. There are two parts: the central nervous system, or CNS, and the peripheral nervous system, or PNS. The CNS, consists of the brain and spinal cord, while the PNS involves all the nerves that branch off from the spinal cord to the extremities. A. When the spine is crushed or bent in an extreme accident, the spinal cord inside is severely bruised and compressed, causing localized injury and death to many of the nerve cells and their fibers. Some of injured nerves fibers survive intact, but lose their electrical insulation, or myelin, over the very short distance of the injury zone. Nerve impulses are blocked at this point. 1. The myelin is the part of the nerve that actually transfers the electrical signal that enables your muscles to move when you want them to move. B. Nerves regenerate at the rate of about a cm a month. Keep in mind that not all nerves can regenerate (the spinal cord is a prime example) and if a nerve is too damaged or is severed it cannot come back C. Peripheral nerves will regenerate to a certain extent on their own, but they don't regenerate over very long distances. D. The big problem with treating spinal injuries is the fact that mature nerve tissue does not spontaneously regenerate. II. The three basic ways to treat nerve damage are: first, produce regeneration of the remaining segment of a nerve fiber, or make new connections on the other side of

Write My Article Critique Assistance Online

Write My Article Critique Assistance Online Write My Article Critique Write My Article Critique Many students find it difficult to cope with their task of article critique writing. This way or another, sooner or later they are assigned with this type of paper writing and then comes the worst: sleepless nights, stress, and anxiety. Article critique writing is one of the most difficult writing tasks, as it requires not only superb writing skills but also an ability to read between lines. Still, there is always a way out for you! All you have to do is to say, Write my article critique and we will be there for you. The problem with critique writing is that the students do not understand its purpose in most cases. They tend to summarize the content of the article without providing critique of the content. The ability to think critically, be objective, attentive to details are only a few skills a writer should possess while writing article critique. 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USS Hornet (CV-8) in World War II

USS Hornet (CV-8) in World War II USS Hornet (CV-8) was a Yorktown-class aircraft carrier that entered service with the U.S. Navy in 1941. The last ship of its class, Hornet earned famed in April 1942 when Lieutenant Colonel Jimmy Doolittle launched his famed raid on Japan from the carriers deck. Less than two months later, it took part in the stunning American victory at the Battle of Midway. Ordered south in the summer of 1942, Hornet commenced operations to aid Allied forces during the Battle of Guadalcanal. In September, the carrier was lost at the Battle of Santa Cruz after sustaining several bomb and torpedo hits. Its name was carried on by a new USS Hornet (CV-12) which joined the fleet in November 1943. Construction Commissioning The third and final Yorktown-class aircraft carrier, USS Hornet was ordered on March 30, 1939. Construction began at the Newport News Shipbuilding Company that September. As work progressed, World War II commenced in Europe though the United States elected to remain neutral. Launched on December 14, 1940, Hornet was sponsored by Annie Reid Knox, wife of Secretary of the Navy Frank Knox. Workers completed the ship later the following year and on October 20, 1941, Hornet was commissioned with Captain Marc A. Mitscher in command. Over the next five weeks, the carrier conducted training exercises off the Chesapeake Bay. USS Hornet (CV-8) underway in Hampton Roads, VA, October 1941. National Archives and Record Administration   World War II Begins With the Japanese attack on Pearl Harbor on December 7, Hornet returned to Norfolk and in January had its anti-aircraft armament substantially upgraded. Remaining in the Atlantic, the carrier conducted tests on February 2 to determine if a B-25 Mitchell medium bomber could fly from the ship. Though the crew was perplexed, the tests proved successful. On March 4, Hornet departed Norfolk with orders to sail for San Francisco, CA. Transiting the Panama Canal, the carrier arrived at Naval Air Station, Alameda on March 20. While there, sixteen U.S. Army Air Forces B-25s were loaded onto Hornets flight deck. USS Hornet (CV-8) Nation: United StatesType: Aircraft CarrierShipyard: Newport News Shipbuilding Drydock CompanyLaid Down: September 25, 1939Launched: December 14, 1940Commissioned: October 20, 1941Fate: Sunk October 26, 1942SpecificationsDisplacement: 26,932 tonsLength: 827 ft., 5 in.Beam: 114 ft.Draft: 28 ft.Propulsion: 4 Ãâ€" Parsons geared steam turbines, 9 Ãâ€" Babcock Wilcox boilers, 4 Ãâ€" shaftsSpeed: 32.5 knotsRange: 14,400 nautical miles at 15 knotsComplement: 2,919 menArmament8 Ãâ€" 5 in. dual purpose guns, 20 Ãâ€" 1.1 in., 32 Ãâ€" 20 mm anti-aircraft cannonsAircraft90 aircraft Doolittle Raid Receiving sealed orders, Mitscher put to sea on April 2 before informing the crew that the bombers, led by Lieutenant Colonel Jimmie Doolittle, were intended for a strike on Japan. Steaming across the Pacific, Hornet united with Vice Admiral William Halseys Task Force 16 which was centered on the carrier USS Enterprise (CV-6). With Enterprises aircraft providing cover, the combined force approached Japan. On April 18, the American force was spotted by the Japanese vessel No. 23 Nitto Maru. Though the enemy vessel was quickly destroyed by the cruiser USS Nashville, Halsey and Doolittle were concerned that it had sent a warning to Japan. B-25 takes off from USS Hornet (CV-8). National Archives Records Administration Still 170 miles short of their intended launch point, Doolittle met with Mitscher, Hornets commander, to discuss the situation. Emerging from the meeting, the two men decided to launch the bombers early. Leading the raid, Doolittle took off first at 8:20 a.m. and was followed by the rest of his men. Reaching Japan, the raiders successfully struck their targets before flying on to China. Due to the early departure, none possessed the fuel to reach their intended landing strips and all were forced to bail out or ditch. Having launched Doolittles bombers, Hornet and TF 16 immediately turned and steamed for Pearl Harbor. Midway After a brief stop in Hawaii, the two carriers departed on April 30 and moved south to support USS Yorktown (CV-5) and USS Lexington (CV-2) during the Battle of the Coral Sea. Unable to reach the area in time, they diverted towards Nauru and Banaba before returning to Pearl Harbor on May 26. As before, the time in port was short as the Commander-in-Chief of the Pacific Fleet, Admiral Chester W. Nimitz ordered both Hornet and Enterprise to block a Japanese advance against Midway. Under the guidance of Rear Admiral Raymond Spruance, the two carriers were later joined by Yorktown. With the beginning of the Battle of Midway on June 4, all three American carriers launched strikes against the four carriers of Vice Admiral Chuichi Nagumos First Air Fleet. Locating the Japanese carriers, the American TBD Devastator torpedo bombers began attacking. Lacking escorts, they suffered heavily and Hornets VT-8 lost all fifteen of its aircraft. The sole survivor of the squadron was Ensign George Gay who was rescued after the battle. With the battle progressing, Hornets dive bombers failed to find the Japanese, though their compatriots from the other two carriers did with stunning results. In the course of the fighting, Yorktowns and Enterprises dive bombers succeeded in sinking all four Japanese carriers. That afternoon, Hornets aircraft attacked the supporting Japanese vessels but with little effect. Two days later, they aided in sinking the heavy cruiser Mikuma and badly damaging the heavy cruiser Mogami. Returning to port, Hornet spent much of the next two months being overhauled. This saw the carriers anti-aircraft defenses further augmented and the installation of a new radar set. Departing Pearl Harbor on August 17, Hornet sailed for the Solomon Islands to aid in the Battle of Guadalcanal. Battle of Santa Cruz Arriving in the area, Hornet supported Allied operations and in late September briefly was the only operational American carrier in the Pacific after the loss of USS Wasp (CV-7) and damage to USS Saratoga (CV-3) and Enterprise. Joined by a repaired Enterprise on October 24, Hornet moved to strike a Japanese force approaching Guadalcanal. Two days later saw the carrier engaged in the Battle of Santa Cruz. In the course of the action, Hornets aircraft inflicted severe damage on the carrier Shokaku and heavy cruiser Chikuma USS Hornet under attack during the Battle of Santa Cruz, 1942. US Naval History Heritage Command These successes were offset when Hornet was struck by three bombs and two torpedoes. On fire and dead in the water, Hornets crew began a massive damage control operation which saw the fires brought under control by 10:00 a.m. As Enterprise was also damaged, it began to withdraw from the area. In an effort to save Hornet, the carrier was taken under tow by the heavy cruiser USS Northampton. Only making five knots, the two ships came under attack from Japanese aircraft and Hornet was hit by another torpedo. Unable to save the carrier, Captain Charles P. Mason ordered abandon ship. After attempts to scuttle the burning ship failed, the destroyers USS Anderson and USS Mustin moved in and fired over 400 five-inch rounds and nine torpedoes into Hornet. Still refusing to sink, Hornet was finally finished off after midnight by four torpedoes from the Japanese destroyers Makigumo and Akigumo which had arrived in the area. The last U.S. fleet carrier lost to enemy action during the war, Hornet had only been commission one year and seven days.

The qualities of the hero and antihero Essay Example | Topics and Well Written Essays - 1000 words

The qualities of the hero and antihero - Essay Example Playing the hero, Indiana Jones is an idealist. He starts a principled journey against the powerful Nazis and their leader Adolf Hitler in search of the Ark of the Pledge. Indy stands up to bad guys, Nazi thugs, who are determined to acquire the ark. He sacrificed himself against great odds. For instance he compromised his distress of snake in order to acquire the ark. Indiana role as a hero also demonstrates when he rescues Marion and reclaims the ark from Belloq and the Dietrich. Jones is always pro-active and makes effective decisions. For instance, when he surrenders rather than destroy the ark, an important historical artifact, now in the possession of Belloq. Indiana always succeeded in his goals, which is a true definition of a hero. He managed to keep the agreement out of the reach of the Nazis. Playing the role of an anti-hero in the movie Payback, Mel Gibson (Porter) is a realist. Porter is a criminal: a killer, a thief, a thug, a gambler, a cheater, and a liar. He murdered many, including Resnick and Philip. Self-interest drives him as shown when he narrated; he had $70,000 robbed from him, and that is what he desires to get back The heroism in him demonstrates through the vengeance mentality. He stands up to authority in tracking the money that had passed into the hands of "the Outfit". In order to reach Resnick, the Porter first dealt with Arthur Stegman, the Chinese trios, crime bosses from the Outfit, and the unethical police detectives Leary an d Hicks. Most notably as an antihero, Porter eventually fails in his goal of reclaiming the money. Harrison Ford depicted as Indiana Jones is evidently a masculine character. Indiana shows heroism through the enormous resources he possesses for the use of the gun, fists and whip when relevant. Indiana also demonstrates the character of a rebel. In a general view, Indiana

Introduction to the Criminal Justice System Essay

Introduction to the Criminal Justice System - Essay Example The authority of the agencies involves law deception and law exemption, secret police and other law issues outside power and control of the local law enforcement agencies. The Office of the United States Attorneys is an important body as it represents such institutions as federal government in US district court and the court of appeal. From this perspective, federal law enforcement is essentially a straightforward matter: the law and common sense are all that are required. Bittner remarked that organizations are 'permanently flooded with petty military and bureaucratic regulations' Legalism is closely linked to the conception of police organizations as effective bureaucracies. The federal judiciary consists of the Circuit Courts and permanent appellate court for each circuit. Today, 94 courts are established around the country. The federal judiciary is headed by the chief judge of the court of appeal. There are 12 circuits in the USA, and each of these courts has its own court of appeal. This can get complicated because more than one person may have control over an area. People unfamiliar with the legal system may also find the concept of standing complicated. Generally, people must have had their own rights violated before they can object in court (Koletar, 2005).

Analyzing a Written Essay Essay Example for Free

Analyzing a Written Essay Essay The two essays that I read were â€Å"A Soul as Free as the Air: About Lucy Stone† and, â€Å"How to succeed as an Online Student†. The four types of essay organization discussed in the course readings were; 1. Topic: This development organizes information about the topic in the most logical way. 2. Time order: It is using sequential order to write an essay. It organizes the information from one time period to another. 3. Space order: This deals with location of people, places or things. 4. Informative process: This is written in a step-by-step arrangement in their natural occurring order. The characteristics that make these essays expository, is that it has facts to inform about the topic. It is used in facts form and not biased.  What distinguishes space organization from time organization or informative-process organization in an essay is that Space order deals with location, Time organization refers to placing information in chronological order by date or a specific time, and Informative essay would be one that takes on a step-by-step process. The organization of each essay help the reader understand the subject matter of that essay in the essay â€Å"How to Succeed as Online Student†, it list steps to teach online students what it takes to be successful in an online atmosphere. The reader understands you must follow these steps to succeed. On the essay, â€Å"A Soul as Free as the Air: About Lucy Stone† it helped to learn about Lucy Stone, it showed the order of her achievements. On the essays that I read, the one that has the most effective organi zation was â€Å"A Souls as Free as the Air: About Lucy Stone†. I chose this essay, because it was organized from the beginning to the end, it was in the order of each of her achievements. A different type of organizational style for â€Å"How to Succeed as Online Student† if you change it to a time order or space order, then it would confuse some of the online students. The main part would be lost in the reading. It would definitely have students wanting to go to class instead of online, so the teacher could clarify things. The type of essay organization that is more suitable for my essay topic on â€Å"Warming Global; Drought,† would be Time Order, due to the heat and water levels at the time.

The Symbolic Use of Hunger in Literature :: essays research papers

The symbolic use of hunger in literature   Ã‚  Ã‚  Ã‚  Ã‚  Throughout history, both men and women have struggled trying to achieve unattainable goals in the face of close-minded societies. Authors have often used this theme to develop stories of characters that face obstacles and are sometimes unable to overcome the stigma that is attached to them. This inability to rise above prejudice is many times illustrated with the metaphor of hunger. Not only do people suffer from physical hunger, but they also suffer from spiritual hunger: a need to be full of life. When this spiritual hunger is not satisfied, it can destroy a life, just as physical hunger can kill as well. Characters such as Edna Pontellier of Kate Chopin's The Awakening, Hugh Wolfe of Rebecca Harding Davis' Life in the Iron Mills, Jane Eyre of Charlotte Bronte's novel, and the woman being force fed in Djuna Barnes' How It Feels to Be Forcibly Fed all suffer from an insatiable hunger, which, in most cases, ultimately is not fulfilled. Poets such as Anna Wickham also describe the plight of humanity using hunger as a means to illustrate the feeling of deprivation. Although all of these characters come from different walks of life, they share a common struggle. Edna belongs to upper class Creole society, Hugh Wolfe is a poverty-stricken immigrant laborer, and Jane Eyre, an orphan. These characters lived during the middle to the end of the nineteenth century, in completely distinct worlds, yet all had their creativity stifled by society. Similarly, Djuna Barnes poem of the British woman who goes on a hunger strike in an attempt to get the vote and Anna Wickham's poem The Affinity describin g the angst of a deprived wife, both depict women who lived during the early twentieth century and, although different, were both suppressed in some way. Edna Pontellier was a woman who was forced to comply with the rules of Creole society, but, in being reluctant to do so, found herself in a world where she felt trapped. She saw how women were supposed to behave but did not have that behavior instilled in herself. She felt confined by her husband's expectations, and did not want to live out the typical role of wife and mother. When Robert came into her life, she began to feel that she was being 'awakened.'; She was beginning to experience life in a new light and the hunger for change began to emerge.

Vertical Unfired Pressure Vessel Components Engineering Essay

The American Society of Mechanical Engineers was organized in 1880 as an educational and proficient society of mechanical applied scientists. After old ages of development and public remark, the first edition of the Code, ASME Rules of Construction of Stationary Boilers and for Allowable Working Pressures, was published in 1914 and officially adopted in the spring of 1915. The first Code regulations for force per unit area vass, entitled Rules for the Construction of Unfired Pressure Vessels, followed in 1925. From this simple get downing the Code has now evolved into the present 11 Section papers, with multiple subdivisions, parts, subdivisions, and compulsory and non-mandatory appendices. Almost all force per unit area vass used in the procedure industry in the United States are designed and constructed in conformity with Section VIII Division 1. In this undertaking, some general constructs standards related to ASME Code Section VIII are discussed. These include allowable emphasis, factors of safety, joint efficiency and force per unit area testing. The aim of this undertaking is to plan and analysis Unfired Vertical Pressure Vessel based on ASME Code Section VIII Division 1 and criterions. This undertaking merely concerned to plan chief portion of force per unit area vas like shell, caputs, noses and supports. The regulations in Section VIII Division 1 do non cover all applications and constellations such as planing leg supports. When the regulations are non available, another method must be used.Problem statementThe force per unit area vass that non follow any standard codifications can be really unsafe. In fact many fatal accidents have occurred in the history of their operation and development. They are many criterions and codifications that vary from state to state. The common criterions and codifications that have been used are ASME Boilers and Pressure Vessel Codes, API Standards, PD5500, British Standards, European Codes and Standards and other Intern ational Codes. Even though there are computing machine assisted force per unit area vas design available in the market, but due to concern benefit, the system may non be salable or pricey. In add-on the expression and constructs applied in the system are ever unknown by the users.Research rangeThis undertaking focuses on design and analysis of Unfired Vertical Pressure Vessel based on ASME Code Section VIII Division 1. Based on this codification, force per unit area vass are application for the containment of internal and external force per unit area up to 3000 pounds per square inch. This force per unit area could be obtained from an external beginning or by the application of heat from a direct or indirect beginning or any combination of them. The ASME Code is building codification for force per unit area vas and contains demands, specific prohibitions ; and non-mandatory counsel for force per unit area vas stuffs, design, welding and proving. To guarantee the aim of this undertak ing is achieved, some of the of import elements must be consider. There is: Planing chief constituents of Unfired Vertical Pressure Vessel by refer to ASME Code Section VIII Division 1 and criterions. Analysis of maximal stress value of chief constituents of force per unit area vas by finite component utilizing ANSYS package.Aims of UndertakingThe intent of this undertaking is to plan and analysis of Vertical Unfired Pressure Vessel based on ASME Code Section VIII Division 1. This research worker points two aims to be achieved at the terminal of this research. The aims are: 1. To plan Vertical Unfired Pressure Vessel constituents based on ASME Code VIII Division 1 and Standards. 2. To analyse maximal tantamount emphasis ( von-Misses ) , maximal shear emphasis, maximal distortion and safety factor in shell by finite component utilizing ANSYS package.Significance of surveiesThe undertaking will convey a great important non merely for the fertiliser industry but besides to the all the fabrication sector that used a assorted force per unit area vas for day-to-day operation. Nowadays, most the fabrication industry in Malaysia which used force per unit area vas for operational intent depends on their country of application. As a consequence, their operation, design, industry is regulated by technology governments backed up by Torahs. All force per unit area vass are manufactured with the maximal safe operating force per unit area and temperature. By finishing this undertaking, pupil will derive exposure to the ASME codification and criterions.Chapter 2.0LITERATURE REVIEW2.1 IntroductionThe force per unit area vass such as cylinder, grapevine or armored combat vehi cles are design and concept to hive away gas or fluids under force per unit area. The gas or fluid that being stored may be through alteration of province inside the force per unit area vas, for illustration instance of steam boilers or it might unite with other reagents, such as a chemical works. The force per unit area vass must plan with a perfect attention because cleft of force per unit area vass will do an detonation which may do of decease and loss of belongings. The stuff that be used to build force per unit area vass may be malleable such as mild steel or brittle such that dramatis personae Fe. In by and large, force per unit area vass and others storage armored combat vehicle such as hydraulic cylinders, gun barrels, pipes, boilers and armored combat vehicles are of import to the chemical, crude oil, petrochemical, atomic industries and so on. Chemical reactions, separations, and storage of natural stuffs ever occur in this category of equipment. By and large, pressurized equipment is required and been used for a wide scope of industrial works for storage and fabrication intents [ 1 ] .2.2 Types of Pressure VesselThe size and geometric signifier of force per unit area vass diverge greatly from the big cylindrical vass used for high-pressure gas storage to the little size used as hydraulic units for aircraft. Some of the vass are buried in the land or deep in the ocean, but most are positioned on land or supported in platforms. There are chiefly two types of force per unit area vass normally available in industry:Spherical Pressure VesselThis type of force per unit area vass are known as thin walled vass. This forms the most typical application of plane emphasis. Airplane of emphasis is a category of common technology jobs affecting emphasis in a thin home base. Spherical vass have the advantage of necessitating dilutant walls for a given force per unit area and diameter than the tantamount cylinder. Therefore they are used for big gas or liquid conta iners, gas-cooled atomic reactors, containment edifices for atomic works, and so on. Degree centigrades: Userszalie87Desktopspherical force per unit area vas 2.jpg Figure 2.1 Spherical Pressure Vessel [ beginning: hypertext transfer protocol: //communities.ptc.com/thread/39900 ]Cylindrical Pressure VesselThis type of a vas designed with a fixed radius and thickness subjected to an internal pot force per unit area. This vas has an axial symmetricalness. The cylindrical vass are by and large preferred, since they present simpler fabrication jobs and do better usage of the available infinite. Boiler membranophone, heat money changers, chemical reactors, and so on, are by and large cylindrical. A C: Userszalie87Desktoppressure-vessel-500Ãâ€"500.jpg C: Userszalie87Desktopvertical_expansion_tank.gif Figure.2: Cylindrical ( Horizontal & A ; Vertical ) Pressure Vessel [ beginning: hypertext transfer protocol: //www.energyflowsystems.com/pv.htm and hypertext transfer protocol: //www.pumpsukltd.com ]2.3 Main Components of Pressure VesselThe chief force per unit area vas constituents are as follow:2.3.1 ShellThe shell is the chief constituent of any vass that contains the force per unit area. Material of shell usually come in home base or rolled steel. Commonly, some force per unit area vas shells has a rotational axis and be welded together to organize a construction. Most pressure vas shells are cylindrical, spherical, or conelike in form.2.3.2 HeadAll force per unit area vas shells must be closed at the terminals by caputs. Heads that normally used are typically in curved instead than level. Configurations of curving form stronger and allow the force per unit area vas ‘s caputs to be thinner, lighter and less expensive instead than level caputs. Inside a vas, caputs can besi des be used. Heads are normally can be categorized by their forms. Ellipsoidal, hemispherical, torispherical, conelike, toriconical and level are the common types of caputs. Figure 2.3 shows assorted types of caputs. Ellipsoidal would be the most common type of caputs, which is used during the designing of a new force per unit area vas. [ 11 ] Figure 2.3: Typical Types of Heads [ beginning 11 ]2.3.3 NozzlesA nose is a cylindrical constituent that penetrates and mounts whether at the shell or caputs of a force per unit area vas surface. The nozzle terminals are by and large flanged. Flanges map is to let the necessary connexions. Flanges besides use to allow easy disassembly for modus operandis care or easy entree. Nozzles normally are used for the undermentioned applications [ 11 ] : Attach piping for flow recess or mercantile establishment of the vas. Attach instrument connexions such as degree gages, thermowells, or force per unit area gages. Provide entree to the vas inside at manholes. Provide for direct fond regard of heat money changer or sociable. Nozzles sometimes extended into the vas inside for some applications, such as for recess flow distribution or to allow the entry of thermowells.2.3.4 SupportThe type of support that is designed and used depends on the orientation of the force per unit area vessel whether horizontally or vertically. In any state of affairs, the force per unit area vessel support must be adequate to back up the applied weight and other tonss. Design force per unit area of the vas is non being considered in the design of its support because the support is non be pressurized. But, design temperature should be considered for support design. It should be considered from the position of stuff choice and proviso for differential thermic enlargement. Several sorts of supports are as follow [ 11 ] : Skirt This type of support by and large been used for tall, perpendicular, cylindrical force per unit area vass. This type of support is a cylindrical shell subdivision which is be weld either to the underside of the vas shell or to the bottom caput for the cylindrical vass. Skirt support for spherical vas is welded to the vas near the mid plane of the shell. The skirt is usually design long plenty to supply flexibleness so that radial thermic enlargement of the shell does non do high thermic emphasiss at its junction with the skirt. Leg Small perpendicular membranophones are usually supported by legs that are welded to the underside of the force per unit area shell. The maximal ratio of support provides for leg length to beat diameter is typically 2:1. The figure of legs is designed depends on the membranophone size and the tonss to be carried. Support legs are besides normally designed for spherical force per unit area vass. The support legs for little perpendicular vass and spherical storage vass usually made from high C stuff such as structural steel columns or pipe subdivisions, which provides a more efficient and perfect design. Saddle Horizontal membranophones are usually supported by saddle. This type of support divides the weight burden over a big country of the shell to avoid an unneeded emphasis in the shell at two different locations. The breadth of the saddle is considered by the specific size and design conditions of the force per unit area vas. One saddle support is usually fixed or anchored to its foundation. A typical strategy of saddle support is shown on Figure 2.2.4. Figure 2.4: Typical Scheme of Saddle [ beginning 11 ]2.4 Overall Design Procedure of Pressure VesselsPressure vass as constituents of a complete works are designed to run into assorted demands as determined by the interior decorators and analysts responsible for the overall design. The first measure in the design process is to choose the necessary relevant information, set uping in this manner a organic structure of design demands, as shown in Figure 2.5. Once the design demands have been established, suited stuffs are selected and the specified design codification will give an allowable design or nominal emphasis that is used to dimension the chief force per unit area vas thickness. Extra codification regulations cover the design of assorted vessel constituents such as noses, rims, and so on. Following these regulations an agreement of the assorted constituents are finalized and analyzed for failure. Most of the types of failure relevant to coerce vessel design are stress dependent and therefore it is necessary to guarantee the adequateness of the emphasis distribution and look into against different types of postulated failure manners. The proposed design is eventually iterated until the most economical and dependable merchandise is obtained. The functional demands cover the geometrical design parametric quantities such as size and form, location of the incursions, and so on. Some of these parametric quantities may hold to be fixed in coaction with the overall design squad, but in a bulk of state of affairss the force per unit area vas interior decorator acts freely on the footing of his or her experience. In the process in planing force per unit area vass, safety is the chief factor that must be consider, particularly for the high force per unit area works such as atomic reactor force per unit area vass, due the possible impact of a possible terrible accident. In general nevertheless, the design is a via media between consideration of economic sciences and s afety. The possible hazards of a given manner of failure and its effects are balanced against the attempt required for its bar. The ensuing design should accomplish an equal criterion of safety at minimal cost. Safety can non be perfectly assured for these two grounds. First, the existent signifier of lading during service may be more terrible than was anticipated at the design phase: unnatural, unpredictable tonss necessarily occur during the force per unit area vas ‘s life-time. Second, our cognition is rarely equal to supply a qualified reply to the break of stuffs, province of emphasis under certain conditions, and so on. It is true that although the cardinal mechanism of failure is non sufficiently understood, it is possible to set up preventative steps based on semi empirical methods. Following this line of thought, the force per unit area vass could be classified harmonizing to the badness of their operations since this will impact both the possibility of failure and its effects. These considerations lead to the categorization of vass runing from atomic reactor force per unit area vass at one terminal to belowground H2O armored combat vehicles at the other. The design factor used in the ASME Boiler and Pressure Vessel Code1 is intended to account for unknown factors associated with the design and building of the equipment. The design expression and the emphasis analysis methods are by and large approximative and have constitutional premises. Typically it is assumed that the stuff is homogenous and isotropic. In the existent universe the stuff has defects and discontinuities, which tend to divert from this premise. Figure 2.5: Design ProcedureChapter 3.0Methodology3.1 OverviewIn this chapter, the information in choice of force per unit area vas is described and the application of selected force per unit area vas is been discussed. To plan of force per unit area vessel the choice of Code are of import as a mention usher to accomplish the secure force per unit area vas. The choices of ASME Code Section VIII div 1 are described. The criterion of stuff choice used are explains in this chapter. Beside of that, the design and analysis package to obtain the consequence are introduced. Alternatively of that, design procedure methodological analysis is besides described.3.2 General Design Considerations: Pressure Vessels3.2.1 MaterialsGeneral stuff demand have been described in paragraphs UG-4 through UG-15. There are some points that must be considered which is related to the general stuff demands that will be discussed below. [ 2 ] The chief factors of stuff choice that must be considered are [ 12 ] :StrengthStrength is a stuff ‘s ability to digest an imposed force or emphasis applied. Strength is an of import factor in the stuff choice for any peculiar application. Strength determines the midst of a constituent that must be to defy the forced tonss.Corrosion ResistanceCorrosion defines as the weakening of stuff by chemical reaction. Material ‘s opposition to corrosion is the most of import factor that influences its choice for a specific application. Stipulate a corrosion allowance is the common method that used to specify corrosion in force per unit area vass constituents.Fracture StaminaFracture stamina defines as the capableness of a stuff to defy conditions that could do a brickle break. The break stamina of a stuff can be determined by utilizing Charpy V-notch trial to specify the magnitude of the impact energy and force that is required to fracture a specimen.FabricabilityFabricability defines as the easiness of building and to any particular fiction patterns that are required to utilize the stuff. Normally, force per unit area vass use welded building. The stuffs used must be weldable so that constituents can be assembled onto the accomplished force per unit area vas. The force per unit area vas design codifications and criterions include lists of acceptable stuffs ; in conformity with the appropriate stuff criterions.3.2.2 Design and Operating TemperatureIn ASME Code Section VIII Div 1, upper limit and minimal design temperatures can be established in Paragraph UG-20. The maximal design temperature can be define as the maximal temperature used in vessel design and it shall non be lesser than the average metal temperature estimated under normal operating conditions for the portion that want to be considered. [ 3 ] The operating temperature is the gas or unstable temperature that occurs under the normal operating conditions. Before planing a vas, the operating temperature must be set based on the upper limit and minimal metal temperatures that the force per unit area vas may meet any state of affairs. [ 4 ]3.2.3 Design and Operating PressureDesign force per unit area of the vas can be established in Paragraph UG-21. In this paragraph, the demand of the vas to be designed for any terrible force per unit area and temperature that is coincidently expected in normal operation has been provided. When set up the maximal operating force per unit area, all conditions such as start-up, closure, and any identified disquieted conditions can be considered. Set force per unit area of the force per unit area alleviation device in an operating system must be above the operating force per unit area by a sufficient sum so that the device does non trip by chance. A vas must be designed to defy the maximal force per unit area to which it is likely to be subjected in operation status. Before planing a vas, the operating force per unit area must be set based on the maximal internal or external force per unit area that the force per unit area vas may meet. The design force per unit area is usually taken as the force per unit area at which the alleviation device is set for vas that under internal force per unit area. To avoid specious operation during minor procedure disturbances, usually the operation force per unit area is 5 to 10 per cent above the normal on the job force per unit area. The hydrostatic force per unit area in the base of the column should be added to the operating force per unit area if make up one's minding the design force per unit area. [ 2 ]3.2.4 Design Maximum Allowable StressMaximum allowable emphasis that have to be consider in planing a vas which be used for internal and external force per unit area has be describe in Paragraph UG-23. The allowable tensile emphasiss are tabulated in ASME Code Section II, Part D of the Boiler and Pressure Vessel Code. In UG-23 ( a ) indicates that for stuff that has been identified as meeting more than one stuff specification, the allowable emphasis for the specification may be used and provided that all the restrictions of the specification is satisfied. In UG-23, standard for the maximal allowable longitudinal compressive emphasis to be used for cylindrical shells that are subjected to longitudinal compressive tonss besides have been provided. The first status is that the maximal allowable longitudinal compressive emphasis can non be greater than the maximal allowable tensile emphasis. The 2nd status is based on buckling of the constituent. In Paragraph UG-23 ( degree Celsius ) , the wall thickness of a force per unit area vas shell defined by these regulations and it should be determined and the induced maximal membrane emphasis does non transcend the maximal allowable emphasis value in tenseness has been stated. [ 2 ] Typical design emphasis factors for force per unit area constituents are shown in Table 3.1. Table 3.1: Design emphasis factors Property Material Carbon Carbon-manganese, unstained metals low metal steels Austenitic chromium steel steels Non-ferrous metals Minimal output emphasis or 0.2 per centum cogent evidence emphasis, at the design temperature 1.5 1.5 1.5 Minimum tensile strength, at room temperature 2.35 2.5 4.0 Mean emphasis to green goods rupture at 105 H at the design temperature 1.5 1.5 1.03.2.5 Thickness of shell under internal force per unit areaInformation and demand of thickness or maximal allowable force per unit area for a shell under internal force per unit area are provided in paragraph UG-27. The equations for circumferential emphasis which is the emphasis moving across the longitudinal seam for cylindrical shell are as follows [ 1 ] : or ( 3.2.5.1 ) Figure 3.1: Shell Under Internal Pressure For cylindrical shells for longitudinal emphasis which the emphasis moving across the circumferential articulations, the equations are or ( 3.2.5.2 ) T = lower limit needed thickness of shell, in. ( in the corroded status ) P = internal design force per unit area, pounds per square inch R = inside radius of shell under consideration, in. ( Corroded status ) S = maximal allowable emphasis from the applicable allowable emphasis tabular array in Section II, Part D E = Joint efficiency for welded articulations ( Table UW-12 ) , or the ligament efficiency between gaps ( UG-53 ) . For spherical shells, or ( 3.2.5.3 ) These equations are really simple. However, there are some related issues that must be discussed. These two equations are usually based on thin wall theory.3.2.6 Thickness of shell under external force per unit areaThe information and demand that used to plan shells and tubings under external force per unit area is given as a design burden is given in paragraph UG-28. The definitions for assorted geometries are diagrammatically shown in Figure 3.2.a ( Fig.UG-28.1 ) . [ 2 ] Figure 3.2.a: Diagrammatic Representation of Lines of Support for Design of Cylindrical Vessels Subjected To External Pressure ( Beginning: Fig. UG-28.1 of Section VIII Div. 1 of the ASME 2010 Code ) Figure 3.2.b: Maximal Arc of Shell Left Unsupported Because of Gap in Stiffening Ring of Cylindrical-Shell under External Pressure ( Beginning: Fig.UG-29.2 of Section VIII Div.1 of the ASME 2010 Code ) Stiffness ring that has been provided with uninterrupted around the perimeter of the vas is to defy external force per unit area. Between the ring and the shell, spreads have been allowed ; nevertheless, the ring has to be uninterrupted and the discharge of the spread is limited by Figure 3.2.b. The extra demands of UG-29 ( degree Celsius ) ( 1 ) through UG-29 ( degree Celsius ) ( 4 ) should be satisfy when the discharge of the spread between the ring and shell does non run into the Figure 3.2.b demands. [ 2 ]3.2.7 Formed HeadsInformation and regulations for the design of formed caputs are given in paragraph UG-32. The needed thickness of spheroidal caputs expression is given by or ( 3.2.7.1 ) D = diameter of the oval major axis Figure 3.3: Ellipsoid caput ( Beginning: 7 ) Other expressions to plan caputs are as given in UG-27.Ellipsoidal caputs has a ratio of 2:1 if at that place does non hold a major to minor diameter. The torispherical caput with the metacarpophalangeal joint radius requires a thickness for a equal to 6 % of the inside Crown radius and the inside crown radius equal to the outside diameter of the is given by [ 7 ] or ( 3.2.7.2 ) Where: L = inside crown radius of the formed caput Figure 3.4: Torispherical caput ( Beginning: 7 )3.2.8 Openings and SupportsWhen planing an gap in a force per unit area vas, there is a stress ensuing from the hole that is formed on the shell. This is similar to the classical emphasis concentration consequence of a hole in a home base that is loaded in grip. The codifications for support do non see loads other than force per unit area. Openings in shells should be round, egg-shaped, or obround. If the connexion is slanting to the surface of the shell, the egg-shaped gap in the shell will be used. The proof trial in Paragraph UG-101should is applied if the strength of vass with such gaps can non be determined. [ 2 ] There is no bound to the size of an gap that may be designed on a force per unit area vas. The gap and support regulations in paragraph UG-36 through UG-43 stated in ASME Code will be apply to gaps non transcending the undermentioned vas size. For illustration, vass of 60 inches inside diameter and less, the gap may be every bit big as one half the vas diameters, but non to transcend 20 inches. Then, for vass over 60 inches inside diameter, the gap may be every bit big as one third the vas diameter, but non to transcend 40 inches. [ 2 ]Design for Internal PressureThe entire transverse sectional or country of support A in any plane through the gap for a shell or caput under internal force per unit area that has been required shall be non less than A = dtrF + 2tn thyrotropin-releasing hormone ( 1 a?’ fr1 ) ( 3.2.8.1 )Design for External Pressure( 1 ) The support that capable to force per unit area ( external ) must be considered for gaps in individual walled vass must merely 50 % of that required in design for internal force per unit area, where tr is the wall thickness required by the regulations for vass under external force per unit area and the value of F shall be 1.0 in all external force per unit area support computations. [ 2 ] ( 2 ) The support required for gaps in each shell of a multiple walled vas shall follow with above information when the shell is capable to force per unit area ( external ) and with design for force per unit area ( internal ) above when the shell is capable to internal force per unit area, no affair there is a common nose secured to more than one shell by strength dyer's rockets. [ 2 ]3.2.9 NozzlesThe lower limit wall thickness of nozzle cervixs should be determined as given expression below. For entree gaps and gaps used merely for review [ 2 ] : tUG-45 = Ta ( 3.2.9.1 ) For other noses: Determine terbium. terbium = min [ tb3, soap ( tb1, tb2 ) ] ( 3.2.9.2 ) tUG-45 = soap ( Ta, terbium ) ( 3.2.9.3 ) where Ta = lower limit cervix thickness required for internal and external force per unit area utilizing UG-27 and UG- 28 ( plus corrosion allowance ) , as applicable. The effects of external forces and minutes from auxiliary tonss ( see UG-22 ) shall be considered. Shear emphasiss caused by UG-22 burdens shall non transcend 70 % of the allowable tensile emphasis for the nozzle stuff. tb1 = for vass under internal force per unit area, the thickness ( plus corrosion allowance ) required for force per unit area ( presuming E p 1.0 ) for the shell or caput at the location where the nozzle cervix or other connexion attaches to the vas but in no instance less than the minimal thickness specified for the stuff in UG-16 ( B ) . tb2 = for vass under external force per unit area, the thickness ( plus corrosion allowance ) obtained by utilizing the external design force per unit area as an tantamount internal design force per unit area ( presuming E p 1.0 ) in the expression for the shell or caput at the location where the nozzle cervix or other connexion attaches to the vas but in no instance less than the minimal thickness specified for the stuff in UG-16 ( B ) . tb3 = the thickness given in Table UG-45 plus the thickness added for corrosion allowance. tUG-45 = lower limit wall thickness of nose cervixs In Paragraph UG-45, the regulations for minimal nozzle cervix thickness have been provided. A nozzle cervix or any other connexion shall non be thinner than that required to fulfill the thickness demands for the tonss defined in paragraph UG-22. Except for manhole and other gaps that are provided merely for entree, extra demands of paragraph UG-45 may necessitate a thicker nose cervix. [ 2 ]3.2.10 Legs supportLegs supports usually are used to back up perpendicular force per unit area vas. Legs support can be made detachable from the vas. These supports can be bolted or welded to blast home bases. Leg supports design method is similar to that for bracket support. If the legs are welded to the shell, so the shear emphasiss in the dyer's rocket will be given by [ 2 ] : ( 3.2.10.1 ) Where, tW = Weld Height LW = Weld Length. These sorts of supports are suited merely for little and moderate force per unit area vass as there is a concentrated local emphasis at the joint. Figure 3.5: Leg Support3.2.11 Joint Efficiency FactorsThe strength of a welded articulation will depend on the type of articulation and the quality of the welding. The soundness of dyer's rockets is checked by ocular review and by non-destructive testing ( skiagraphy ) . The possible lower strength of a welded articulation compared with the virgin home base is normally allowed for in design by multiplying the allowable design emphasis for the stuff by a â€Å" welded articulation factor † J. The value of the joint factor used in design will depend on the type of joint and sum of skiagraphy required by the design codification. Typical values are shown in Table 3. Taking the factor as 1.0 implies that the joint is every bit every bit strong as the virgin home base ; this is achieved by radiographing the complete dyer's rocket length, and cutting out and refashioning any defects. The usage of lower joint factors in design, though salvaging costs on skiagraphy, will ensue in a thi cker, heavier, vas, and the interior decorator must equilibrate any cost nest eggs on review and fiction against the increased cost of stuffs. [ 2 ] Table.2: Maximum allowable articulation efficiency Type of articulation Degree of skiagraphy 100 % topographic point none Double-welded butt or equivalent 1.0 0.85 0.7 Single-weld butt articulation with adhering strips 0.9 0.80 0.65 In ASME Code Section VIII Division 1, joint efficiency factors influence the degree of scrutiny of articulations on force per unit area vas. The grade of scrutiny influences the needed thickness through the usage of Joint Efficiency Factors, E. This factor is sometimes referred to as Quality Factors or weld efficiencies serve as emphasis multipliers applied to vessel constituents when some of the articulations are non to the full radiographed. Basically, ASME Code Section VIII Division 1 vass have variable factors of safety and it depending on the radiographic scrutiny of the chief vas constituents articulations. For this undertaking, to the full radiographed longitudinal butt-well articulations in cylindrical shell use a Joint Efficiency Factor, E of 1.0. There are four joint classs require that have been identified in ASME Code Section VIII Division 1. They are classs A, B, C and D as shown in figure below. [ 2 ] Figure 3.6: Welded Joint Categories ( Beginning: 2010 ASME VIII Div1 )3.2.12 Corrosion allowanceThe corrosion allowance is the extra thickness of metal added to let for stuff lost by corrosion and eroding, or scaling. The allowance to be used should be agreed between the client and maker. Corrosion is a complex phenomenon, and it is non possible to give specific regulations for the appraisal of the corrosion allowance required for all fortunes. The allowance should be based on experience with the stuff of building under similar service conditions to those for the proposed design. For C and low-alloy steels, where terrible corrosion is non expected, a minimal allowance of 2.0 millimeters should be used ; where more terrible conditions are anticipated this should be increased to 4.0 millimeters. Most of design codifications and criterions available stipulate a minimal allowance of 1.0 millimeter. [ 2 ]3.3 Finite Element Analysis by ANSYSThis undertaking is set out to verify finite comp onent analysis, FEA when applied to coerce vessel design. Finite Element Analysis is a simulation technique. Function of this technique is to measure the behaviour of constituents, equipment and constructions for assorted lading conditions including applied forces, force per unit areas and temperatures. There are many complex technology jobs with non-standard form and geometry can be solved utilizing this analysis [ 5 ] . Consequences that can be achieve by this analysis such as the emphasis distribution, supplantings and reaction tonss at supports for any theoretical account. There are figure of scenarios can be done such as design optimisation, material weight minimisation, form optimisation, codification conformity and more by utilizing this analysis [ 10 ] . The finite elements analysis was performed utilizing ANSYS package. ANSYS widely used in the computer-aided technology ( CAE ) field in many industries [ 10 ] . ANSYS package helps applied scientists and interior decorators to build computing machine theoretical accounts of constructions, machine constituents or systems by using runing tonss and other design standards and to analyze physical responses such as emphasis degrees, temperature distributions, force per unit area and more. It permits an rating of a design without holding to construct and destruct multiple paradigms in proving. In this undertaking, the analysis will be test on cylindrical shell of the unfired perpendicular force per unit area vas to see the maximal distortion, maximal tantamount ( von-Misses ) and maximal shear emphasis of the shell ‘s stuff. Figure 3.1: Example of ANSYS analysis ; Maximum shear emphasis of Elliptical Head [ beginning 1 ] .Chapter 4.0RESULT AND ANALYSIS4.1 Design Data and CalculationTable 4.1: Pressure Vessel Design Data Design codification : ASME Section VIII Division 1 Type of vas : Vertical Inside diameter : 1300.0 millimeter Temperature Design : 70.0 A °C Operating : 30.0 A °C Pressure Design : 44 BarG Operating : 24.9 BarG Corrosion allowance : 3 millimeter Type of fluid : Natural gas Max. Liquid degree : Not applicable Radiography : Full moon Joint efficiency : 1.0 Type of caput : 2:1 Ellipsoidal Weight Empties : 4791 kilogram Operating : 4850 kilogram ( approximate )4.1.1 MaterialFor choosing stuff for building these force per unit area vas constituents, there are several regulations should be see that available in paragraphs UG-4 through UG-15. For this undertaking, stuff that will be usage is in C and low metal steel ‘s category which is SA-516-70. This type of stuff has been taking based on design force per unit area and design temperature because it is suited for moderate and lower temperature service applications. [ 2 ]4.1.1.1 Properties of MaterialTable 4.2: Properties of Material Material SA-516 Gr 70 Form Home plate Composition C-Mn-Si Tensile strength 552 MPa Output point 260 MPa Density 7.85 g/cm3 Melting Point 1510 A °C ( 2750 A °F )4.1.2 Design PressureRefer to ASME codification in paragraph UG 21, the design force per unit area is a force per unit area that is used to plan a force per unit area incorporating system or piece of equipment. With the design force per unit area, it is recommended for applied scientist to plan a vas and its constituents. Design force per unit area must 5-10 % higher than operating force per unit area, whichever is the higher, will carry through this demand. The force per unit area of the fluid and other contents of the force per unit area vas are besides considered. For this undertaking, design force per unit area is 44.0 BarG. [ 2 ]4.1.3 Operating PressureOperating force per unit area is a force per unit area that less than the maximal allowable on the job force per unit area at which the force per unit area vas is usually operated. Recommended value is 30 % below maximal allowable on the job force per unit area. [ 2 ]4.1.4 Maximum Allowable Stress ValueR efer to ASME codification in paragraph UG 23, the maximal allowable emphasis value that the maximal emphasis allowed in stuff that used to plan force per unit area vas constituents under this regulations. The allowable emphasis value for most stuff at design temperature is the lower 2/7 the minimal effectual tensile strength or 2/3 the minimal output emphasis of the stuff. For this undertaking, the allowable emphasis value is obtained from tabular array in ASME Code Section II ; Part D. Below is allowable emphasis value that simplified from the tabular array in subdivision II, Part D. [ 2 ] Material Metal temperature non transcending deg, F Maximum Allowable Stress, pounds per square inch SA-516 Gr 70 -20 to 650 17500 Table 4.3: Maximal Allowable Stress Value4.1.5 Thickness of Shells under Internal PressureT = PR per UG 27 ( degree Celsius ) ( SE- 0.6P ) = ( 44 x 10^5 ) ( 653 millimeter ) ( 1206.58 Bar ) – 0.6 ( 44 Bar ) = 24.35 millimeter 24.35 millimeter + corrosion allowance, 3 millimeter = 27.35 millimeter So, usage T = 28 millimeter Maximal Allowance Working Pressure, MAWP P = SEt per UG 27 ( degree Celsius ) R + 0.6t = ( 1206.58 x 10^5 ) ( 1 ) ( 28 millimeter ) 650 millimeter + 0.6 ( 28 millimeter ) = 51.98 Barrooms Stress, I?hoop = P ( R + 0.6t ) Et = ( 4.4 x 10^6 ) ( 0.650m + 0.6 ( 0.028 m ) ( 1 ) 0.028 m = 105.25MPa Stress, I?long = P ( R – 0.4t ) 2Et = ( 4.4 x 10^6 ) ( 0.650 m – 0.4 ( 0.028 m ) ( 2 ) 0.028 m = 50.19 MPa Factor of safety = I?yield I?hoop = 120.658 Mpa 105.25 MPa = 1.144.1.6 2:1 Ellipsoidal Head thicknessT = PD per UG 27 ( vitamin D ) ( 2SE-0.2P ) = ( 44 x 10^5 ) ( 1303 millimeter ) 2 ( 1206.58 x 10^5 ) ( 1 ) – 0.2 ( 44 x 10^5 ) = 23.85 millimeter 23.85 millimeter + corrosion allowance, 3 millimeter = 26.85 millimeter So, usage T = 28 millimeter H = D 4 = 1300 4 = 325 millimeter Maximal Allowance Working Pressure, MAWP P = 2SEt per UG 27 ( vitamin D ) D + 0.2t = 2 ( 1206.58 x 10^5 ) ( 1 ) ( 23.85 millimeter ) 1303 millimeter + 0.2 ( 23.85 millimeter ) = 44 Barrooms Stress, I? = P ( D + 0.2t ) 2 T = ( 4.4 x 10^6 ) ( 1.303 m + 0.2 ( 0.024 m ) 2 ( 1 ) ( 0.024 m ) = 119.88 MPa4.1.7 2:1 Nozzle and Flanges4.1.7.1 ( Inlet and Outlet )T = PR per UG 45 ( SE- 0.6P ) = ( 44 x 10^5 ) ( 152.4 millimeter ) ( 1206.58 x 10^5 ) – 0.6 ( 44 x 10^5 ) = 5.68 millimeters ~ 6 millimeter 6 millimeter + corrosion allowance, 3 millimeter = 9 millimeter So, usage T = 9 millimeter Length of pipe 12 † = 211.85 millimeter Flanges Based on slip-on Flanges – ANSI B16.5 300lbs Table 4.4: Slip-On Flanges – ANSI B16.5 300lbs for 12 Inch Nominal pipe size Outside diameter Overal diameter Inside diameter Flanges thickness Overall length Hub diameter Face diameter No.of holes Bolt hole Diameter of circle of holes 12 † 323.8 520.7 327.1 50.80 73.15 374.6 381.0 16 31.70 450.84.1.7.2 ( Manhole )T = PR per UG 45 ( SE- 0.6P ) = ( 44 x 10^5 ) ( 254 millimeter ) ( 1206.58 x 10^5 ) – 0.6 ( 44 x 10^5 ) = 9.47 millimeters ~ 9.5 millimeter 9.5 millimeter + corrosion allowance, 3 millimeter = 12.5 millimeter So, usage T = 12.5 millimeter Length of pipe 20 † = 252 millimeter Flanges Based on slip-on Flanges – ANSI B16.5 300lbs Nominal pipe size Outside diameter Overal diameter Inside diameter Flanges thickness Overall length Hub diameter Face diameter No.of holes Bolt hole Diameter of circle of holes 20 † 508 774.7 513.1 63.50 95.20 587.2 584.2 24 35 685.8 Table 4.5: Slip-On Flanges – ANSI B16.5 300lbs for 20 Inch4.1.7.3 ( Liquide Outlet )T = PR per UG 45 ( SE- 0.6P ) = ( 44 x 10^5 ) ( 25.4 millimeter ) ( 1206.58 x 10^5 ) – 0.6 ( 44 x 10^5 ) = 0.95 millimeters ~ 1 millimeter 1 millimeter + corrosion allowance, 3 millimeter = 4 millimeter So, usage T = 4 millimeter Length of pipe 20 † = 271.8 millimeter Flanges Based on slip-on Flanges – ANSI B16.5 300lbs Nominal pipe size Outside diameter Overal diameter Inside diameter Flanges thickness Overall length Hub diameter Face diameter No.of holes Bolt hole Diameter of circle of holes 2 † 60.3 165.1 62 22.30 33.20 84 91.90 8 19.10 127.0 Table 4.6: Slip-On Flanges – ANSI B16.5 300lbs for 2 Inch4.1.8 Leg supportFor planing leg support, there are no specific regulations or codifications that describes in ASME Code Section VIII Div 1. So, in this undertaking, the leg supports was designed based on available support that be designed for knock out membranophone by Petronas Fertilizer Sdn. Bhd.4.2 Detailss pulling by CatiaFigure 4.1: Unfired Vertical Pressure Vessel [ Please mention Appendix 1 ] Figure 4.2: Shell [ Please mention Appendix 2 ] Figure 4.3: Top Ellipsoidal Head Figure 4.4: Bottom Ellipsoidal Head [ Please mention Appendix 3 & A ; 4 ] Figure 4.5: Leg Support [ Please mention Appendix 5 ]4.3 Inactive Structural Analysis Result and DiscussionFrom the finite component analysis for all burden instances by inactive structural analysis utilizing ANSYS package, there are consequences are obtained.4.3.1 Inactive Structural Analysis of Shell with NozzlesDegree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.6a: Entire Deformation of Shell with Nozzles The figure above shown the entire distortion of the shell with nozzle attached. From the consequences of analysis, it was observed that the maximal distortion occurred at the junction of force per unit area vas ‘s shell and the nose. The maximal distortion was 0.52119 millimeter. Degree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.6b: Equivalent ( von-Mises ) Stress Based on figure above, the maximal emphasiss occurred at the nozzle cervix. The maximal emphasis value obtained is 141.28 MPa. The maximal tantamount emphasis obtained from the analysis was big than maximal allowable emphasis because of affiliated nose cervix due to sudden alteration in the shell geometry and the resulting of alteration in emphasis flow. Degree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.6c: Maximal Shear Stress The figure above represented the maximal shear emphasis that occurs on the shell. There are colourss that represent the degree of emphasis that occur on the shell surface. The bluish colour indicate the country which the emphasis was lowest and the ruddy colour indicated the maximal emphasis occur while the force per unit area has been applied. Degree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.6d: Safety Factor From the analysis of shell with noses attached, the minimal value of factor safety obtained is 0.85406. Because of some deficiency, the value of safety factor is rather low compared to theoretical value. It is because the maximal tantamount emphasis that been obtained was big than maximal allowable emphasis.4.3.2 Inactive Structural Analysis of Shell without NozzlesDegree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.7a: Entire Deformation of Shell without Nozzles For the analysis of shell without nose attached, the consequence has been shown above. Compared with the old analysis on shell with the noses, the value of maximal distortion is less which is merely 0.33246 millimeters. Degree centigrades: Userszalie87AppDataRoamingAnsysv140preview.pngFigure 4.7b: Equivalent ( von-Misses ) Stress The figure shown supra is the consequence of equivalent ( von-Misses ) emphasis that occurs on the shell surface at about design force per unit area of 4.4 MPa. The ruddy colour represents the maximal emphasis which is 116.67 MPa. The maximal emphasis occurs at the underside of the shell. The maximal allowable emphasis for this shell is 120.658 MPa. So, the value obtained in this analysis was below than maximal allowable emphasis. It can be said that this shell was safe. Degree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.7c: Maximal Shear Stress Based on figure above, the maximal emphasiss occur on the surface indoors shell. The minimal shear emphasis occurs on the top shell surface 16.272 MPa and the maximal shear emphasis value obtained is 61.08 MPa which is represented with ruddy colour. Degree centigrades: Userszalie87AppDataRoamingAnsysv140preview.png Figure 4.7d: Safety Factor From the analysis of shell without noses attached, the minimal value of factor safety obtained by computation is 1.14. The value of safety that obtained by this analysis is 1.03 because the maximal tantamount emphasis that be obtained is less than hoop emphasis in manual computation. So the per centum of factor safety between value from computation and analysis is approximately 9.6 % and it ‘s acceptable.Chapter 5.0Summary5.1 DecisionAs the undertaking is completed, it can be concluded that the aims of this undertaking are successfully done. This undertaking had lead to several decisions. However, major decisions are as below: From overall survey of ASME Code Section VII Division 1 in planing perpendicular force per unit area vas, it be said that the chief demand that used to plan this type of vas was be studied decently. Because of some deficiency of information is ASME Code such as regulations for planing leg support, the constituent had been designed merely based on available designed that widely used in industry. This undertaking merely focused on design demands in ASME Code, so the regulation for fiction and review did non be involved. From the analysis of shell with affiliated nose, the maximal distortion of the shell has been obtained. The distortion value was below the allowable deforming for the shell stuff. Then, the maximal tantamount emphasis ( von-Misses ) besides has been obtained over the maximal allowable emphasis. This was because of the geometry of the shell has been changed during nozzle attached. This job occurred besides because of the alteration is stress flow during the tonss has been applied. Because of over maximal tantamount emphasis obtained, the value safety factor had been affected. The value of safety factor obtained was less than 1 ; it might be non good plenty but it still can be considered. From the analysis of shell without nose, the maximal distortion is less than distortion in shell with affiliated nozzle analysis. Then, the value of maximal tantamount emphasis ( von-Misses ) obtained was less than maximal allowable emphasis. The value was approximated to the computation value at about 3.3 % . So, the value of safety factor obtained besides near to the computation value in term of maximal allowable emphasis per upper limit tantamount emphasis. Hence, the shell was in safe status when the operating force per unit area been applied. However, although the codification for design a force per unit area vas had been studied decently, some of information was non described in inside informations. So, this design was non excessively safe and good plenty for fiction. Many demands still had to be considered to do this design perfect. There were many codifications and regulations should be studied and understood decently. By the manner, as been stated earlier, this undertaking has achieved the aims and fulfills the demand of Final Year Project II.5.2 RecommendationApparently, in term of design regulations, there are many facets to looking farther betterment to hold a complete and perfects perpendicular force per unit area vas. The design codifications and criterions must be suitably revised to do certain the design is safe plenty. Because of deficiency of information from the ASME Codes Section VIII Division 1 in planing this force per unit area vas, some of the standards required can non be applied. Some of the information in ASME Code is confidential and need to inquire for their permission before used it. Sometimes engineer, interior decorator or organisation demands to purchase their codifications and criterions which are really expensive. There are others codifications and criterion in planing force per unit area vas available. There besides has package to plan force per unit area in the market. Possibly by utilizing others codifications and criterion or package may better the process in planing force per unit area vas

Bobbie Ann Mason-Shiloh- Setting Analysis Essay

â€Å"Shiloh† was written by Bobbie Ann Mason in 1982. The center of attraction of this narrative is a married couple, Leroy Moffitt and his wife, Norma Jean. During this story the characters are affected by their changing social rural Kentucky environment. In this time period, Kentucky transforms to a more suburb environment from their usual rural surroundings. Apart from their marriage changing with their social environment, so does their role of gender. Leroy and Norma Jean swaps traditional gender roles, which alters their marriage and leads to the breakdown of the Moffitts. The narrative is told from the perspective of Leroy Moffitt, a recent disabled truck driver. Although the injury leads him to sit home all day like a bored housewife, he pursues his hobby that is stereo typically feminine. He constructs craft objects from kits and sews needlepoint pillows, as a pleasurable interest. However, he dreams of building a log cabin for his wife from one of his craft kit model s, which symbolically portrays their marriage. The cabin is an unrealistic idea, and the project does not interest Norma Jean. Despite the fact that nothing dissuades him, he won’t let go of the idea of the cabin in the face of strong opposition that he won’t give up on his marriage in the face of clear evidence that his wife already has. Leroy sooner or later realizes that his marriage is as hollow as the boxy interior of their log cabin. Apart from Leroy’s lack of realization that his wife wants to adapt to her surroundings, and progress with her life, he is still stuck in the past and continues to pester his wife of living in an old log cabin. However, as Leroy builds craft kits and smokes marijuana all day, Norma Jean supports her and her husband by working at a Rexall drugstore. She eventually goes from a weightlifting class to a night composition class, reconstructing her mind and body and doing her best to adapt to change. In the meantime, Leroy resisting to do the same, is happy to be home and feels affectionate towards his wife, but he worries that she does not return these feelings. He wonders if his presence reminds her of their lost son, Randy, who died of sudden infant death syndrome. We have been informed that Leroy’s drug dealer, Stevie Hamilton, would of been the same age of Randy. This event tells the audience that Leroy refuses to move on from the past and continues to bring their marriage to an end. Consequently, the Moffitt’s gets one of their frequent visits from Mabel, the mother of Norma Jean and is constantly nagged by her to take a trip to Shiloh, a Civil War battlefield. This place is where Mabel and her late husband, Jet, spent their honeymoon and she thinks that such a trip will help them solve their marriage problems. After arriving at Shiloh, they see a log cabin, as Leroy expected. Close to the cemetery, they eat lunch. After they eat, Leroy smokes a joint, silence falls, and Norma Jean tells him that she wants to leave him. He suggests starting over, and she says they already did start over. After making her final decision, she travels down a serpentine brick path to begin her journey. Norma jean does not know where this path will lead her, but she knows that she is finally leaving. Leroy and Norma Jean are both victims of rapid social ch ange. Norma Jean was the most affected by her surroundings comparing to Leroy. Norma Jean had to marry at the age of eighteen to the man who got her pregnant, and in a cruel twist of fate, the child dies of sudden infant death syndrome. This event from her life prevents her to look towards the painful past. From the very beginning of the story, Norma Jean is portrayed as a woman continuously trying to better herself. She takes the opportunity of Leroy’s rehabilitation from his accident to start bodybuilding. After the bodybuilding class is over, she takes a composition class at night, and starts to cook more exotic food. Apart from Norma Jean’s efforts to self-improvement, Leroy refuses to move on from the past. While their surroundings are modernizing and changing to a more suburb area, Leroy continues to live in the past, such as living in an old log cabin. Leroy also relates the present to the previous, when he relates the doctor’s son to his own lost son. These two characters opposing each other, leads Norma Jean to her final decision of leaving her husband at the end of the story and the various aspects of her character revealing that desire. These aspects of her character were her devotion to progress in life, and her inability to communicate with her husband while he was still stuck in the past. The setting in the short story â€Å"Shiloh† by Bobbie Ann Mason works well to accentuate the theme of the story. The theme portrayed by the author is that most people change along with their environment, with the exception of the few who are unwilling to adapt, making it difficult for things such as marriage to work out successfully. As Norma Jean advances herself, their marriage ultimately collapses due to Leroy’s unwillingness to adapt with her and the changing environment. The author’s use of the difficulties of Norma Jean and Leroy’s adaptation to their changing environment, leaves the story to its central theme, change and transformation.

The Exxon Valdex Story essays

The Exxon Valdex Story essays How to assess blame in such a horrible and heinous tragedy as the Exxon Valdez crash is not an easy task. There are multiple recipients and no one will ever really agree. It isnt much of a stretch to say that there will never really be a right or wrong answer as to who is the most responsible-there are many different opinions. I think that the one thing people can agree on, though, is that blame is well beyond warranted. The margin for human error didnt seem very big when the ship set out that night-this was a run that had been done over and over again, the captain was well experienced and traffic control was watching them on radar. Yet, as the story slowly unraveled, the viewer slowly learned that all was not as it seemed. That small margin suddenly seemed huge, and the catastrophe that occurred as a result of it only proved it. The one person whom I am sure deserves top blame in this situation, is the captain of the ship. Joseph Hazelwood was well beyond the legal blood alcohol limit while piloting the tanker. He was given multiple warnings by a shipmate that the ship was coming closer to shore every minute and something should be done. Nothing was. As the viewer later found out, Mr. Hazelwood had a long history of alcohol abuse and was checked in to a rehab center several years prior to the incident. Why, then, did Exxon continue to let him work there? His drinking history was a known fact and no one tried to cover it up before the crash happened. This man should have been nowhere near a boat that day, let alone a boat carrying millions of gallons of oil in Prince William Sound. This man had plenty of chances to steer back on course and get out of the shallow area, but by the time he came out of his drunken stupor to actually look at where they were, it was too late to do any good. This brings me to the people whom I think more than fit to carry the second most amount of blame: Exxon. Why did the...

How to Manage and Identify the Boxelder Tree

How to Manage and Identify the Boxelder Tree Boxelder, also known as ash-leaved maple is one of the most common and adaptable urban trees in North America though  it also may be the trashiest from a visual perspective. Planting it next to your house is probably not a good idea. The best thing about the tree is that it is comfortable on poor sites where more desirable trees cannot maintain adequate health for long life. It is very commonly seen in the treeless plains and western United States as a street tree. You can use the tree for quick growth but plan to interplant with more desirable trees to provide for a lasting tree canopy. Boxelder can be a treasure on adverse tree sites. Boxelder Specifics The scientific name of boxelder is Acer negundo (AY-ser nuh-GUHN-doe). Common names include ashleaf maple, Manitoba maple, and poison ivy tree and the tree is a member of the plant family Aceraceae. Although considered by many a maple outcast, it is indeed in the maple family and the only native maple with more than one single blade or leaflet on a single leaf stalk. Boxelder grows in USDA hardiness zones 3 through 8 and is native to North America. The tree is sometimes crafted into a bonsai specimen but often used as a screen/ windbreak and for land reclamation. It grows rapidly, can become very large and needs a lot of space. Boxelder is still a very common tree to see in a yard or park west of the Mississippi River.​ Boxelder Cultivars There are several attractive cultivars of boxelder including Aureo-Variegata, Flamingo and Auratum. The cultivar Acer negundo Aureo-Variegata is noted for its leaves bordered in gold. Acer negundo Flamingo has variegated leaves with pink margins and is somewhat available at local nurseries. Acer negundo Auratum has abundant gold leaves but is a little harder to find. You must remember that even though these cultivars are ornamental, they still share the original boxelder tree’s undesirable characteristics that include unattractive female fruit and breakage that increase the chances of the trees early removal due to quick growth. Problems With Boxelder Boxelder is a rather unattractive tree where limbs break with a vengeance   a landscape maintenance nightmare. The fruit droops in clusters which some describe as looking like dirty brown socks which adds to the overall trashy look of the tree. The boxelder bug makes things even worse. Robert Schafer / Getty Images Boxelder bug or Leptocoris trivittatus loves the boxelder tree. This half-inch red-striped insect is a true pest during winter where the adult multiplies and invades homes near where boxelder trees grow. It is one of the most common household pests in the United States. The bug emits a foul odor, stains fabric and can cause asthmatic reactions. It does no harm to the tree. Boxelder Description A boxelder in the landscape grows to a height of 25 to 50 feet, depending on tree variety and site conditions. One of the tallest ever measured had a recorded height of 110 feet. The trees crown spread is 25 to 45 feet and the crown is typically broad and ragged or disheveled. The tree often has multiple furrowed trunks or very squat single trunks. Flowers are without petals, dioecious and yellowish-green and the female tassels are very conspicuous. The very maple-looking seeds, called samaras hang in long, profuse clusters and stay on the tree throughout winter. Nearly every seed is viable and will cover up a disturbed area with seedlings   a very prolific seeder is boxelder. Boxelder Leaf Botanics Leaf arrangement: opposite/suboppositeLeaf type: odd pinnately compoundLeaflet margin: lobed; serrateLeaflet shape: lanceolate; ovateLeaflet venation: pinnate; reticulateLeaf type and persistence: deciduousLeaflet blade length: 2 to 4 inchesLeaf color: greenFall color: orange; yellowFall characteristic: showy Pruning Boxelder You will have to prune this tree regularly.  Boxelder branches droop as the tree grows and will require pruning if you have consistent walking and vehicular traffic under the canopy. The tree form is not particularly showy and should be grown with one single trunk to maturity. The tree is susceptible to breakage and can occur either at the crotch due to poor collar formation, or where the wood itself is weak and tends to break. Superior Western Boxelders There are also good qualities of boxelders in western North America. It seems that the tree takes on positive characteristics in the west that is not seen in trees in the eastern half of North America. California interior boxelder takes on yellow and red colors in autumn that rival eastern maple. Its drought tolerance makes the tree a welcome plant in that dry country landscape and very easy on limited water resources.

Starting An Aquarium Lab Report Example | Topics and Well Written Essays - 500 words

Starting An Aquarium - Lab Report Example Water in the glass or fibre tank provides the fish with a close to nature location. When the fish are bought and put in the aquarium, they find it an almost natural habitat. There are plants to provide oxygen, the gravel at the bottom acting as a substrate for the plants. The light not only makes the fish look attractive, it helps the plants grow too. The filter helps keep the water clean for the fish, and drains out unwanted chemicals, like ammonia. The powerhead is used to gently circulate the water and drain it out when required. * List of materials and equipment 1. Fish tank: glass or fibre. 2. Stand for the tank. 3. Gravel for the plants. 4. Lights, preferably CFL for the tank. 5. Filter 6. Hood 7. Powerhead 8. Air pumps 9. Net 10. Cleaning Equipment 11. Fish * Directions Steps 1. Choose the Tank: Chose the tank, depending on the size and shape that fits your room. 2. Select or make a stand for the tank to rest on. 3. Place the soil at the bottom, aquarium soil called fluorite is available in pet shops. 4. Next, place the gravel on the layer of soil. 5. Place the decorative material. 6. Add water gently into the tank through a siphon. 7. Drill the hole near the bottom and place a filter (Eheim 2313 Classic filter).Make sure there is a filter intake and filter output 8. Add a CO2 system(yeast/fermentation plant) to help the plants grow well. 9. Place a heater is near the water flow, such as the outlet (or inlet) from the filter, or in the stream of a power head. 10. Install the plants and add water . 11. Add the fish. 12. Place the aquarium lid on top along with the lights, preferably fluorescent. 13. The aquarium is ready to be used.